Senior Management Consultant. Long but somewhat flexible hours, and my clients haven't complained when I limp for a week after a big race.
This hobby has been largely subsidized by my fiance, who fell in love with tri a year before me and has worked hard to get me involved. I estimate $200/month on race fees on AVERAGE (I'm doing sprint tris, foot races, and have a charity bike ride in Sept for which I have committed to raising $1k, but my fiance's 4xHIM/IMAZ fees are bigger). We definitely spend more on nutritional supplements, chews, bites, bars, etc, but I've also started cooking more healthy foods for us (probably a net savings vs. our old eating out excessively). We each got a new bike this year... that probably totaled $5k. We both belong to a tri club ($300/month? but huge discounts on the bikes) and joined a masters swim class ($60/month?). We bought a new car this year ($200 each in monthly payments for the next 5 years) to accommodate the lifestyle and spent an extra $400 on the bike rack and bars on top. $300 each on team kit. 1 extra load of laundry a week to accommodate all the fitness gear. 1 bottle of champagne for post-race fun. We flew to IMAZ to volunteer last year so he could get his spot and are flying back in Nov for 4 days for the race. The rest of our races we drive to, so gas and hotels (we try to go cheap). Add in another couple hundred for bike fits/adjustments/repairs. Ice packs, recovery tools (3 foam rollers of varying types, foot stretchers, foot roller), and compression gear. A Garmin 410 for me, then a Garmin 910 each + his bike computer, quick-release straps, add-ons for trainer riding, and mount kits for bikes. Wetsuit rentals (and we each bought a new one this year after falling in love with the DeSoto 2-piece). 2nd bike trainer after I got into it. Mats to protect the carpet. Tools to repair the bikes. Chamois cream/bodyglide/sunblock en masse. ~$150 on athlete autobiographies/books. He got a waterproof iPod for swim training, fins, buoys, snorkle/goggles. Oh, goggles. We have each gone through a couple pairs (btw, never use rubbing alcohol - it melts them). Post-swim shampoo so my hair doesn't turn green. A proper swimsuit (apparently training in a bikini is frowned upon). Waterbottles, aero bottles, and a bottle brush. 2 big plastic tubs to contain the swim gear/tools. Replacement HR monitor straps, replacement batteries for HR monitor. $80 on Orange Mud towels to protect the car seats (worth it!!) of the new car. $40 on markers/posters to cheer him on. $85 to repair a cracked iPhone screen after I dropped it moving it from training arm band to purse. Training armband for iPhone. He got new headphones (the jaybird things - he likes them). $40 on cute "bibfolios" to store our race bibs. He pays for Strava and I pay for MapMyRun (TrainingPeaks is included in our tri team fees). $6 on epic "How about a threesome?" magnet for the car. Foldy camping chairs for waiting at events. Bib waistbands. A waterbottle waistband for my longer runs. Road ID bracelets. Dare I include $15 on nail polish to match team kit? Sure. Parking fees at events. A LOT on clothes (hot weather running gear, cold weather running gear, bike tops, tri tops, bike shorts, tri shorts, bathing suits, sports bras, headbands, socks, cool wings, leg warmers, arm warmers, shrug, etc...)
Cheering eachother on as we get better, survive challenging events, and push ourselves to be better people? Priceless.
And we're getting married in September! While I'm at my bachelorette, he's doing a HIM. I'm skipping having a birthday party or asking for presents and instead asking for donations to my charity ride, as it's the same day. We missed a family event because we'd done an tri that am and took a bit of hell for that.
We spend a LOT on tri and are lucky enough to have great jobs to support the madness. There was also a high learning curve to figuring out what we like (brands of chamois cream, sunblock, nutrition and gear that fits, shoes that fit, etc). I got lucky with a lot of his hand-me-downs (sunglasses and visor that were too small, wheel with power, waterbottles).
TL;DR : Yeah, tri is quite pricey. I'm expecting our expenses to go down after this year of acquiring the basics.
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You. You make me stronger.