The expo is usually open for bib pickup until 6:00 pm the Sunday before the race.

you will spend $40 a cab ride. while a super close airport that doesn't really make the hotel + cab cheaper than a more expensive hotel and it is certainly not convenient at all. one year i stayed at the Marriott Cambridge across the river and was good and it was cool to tour Harvard and MIT day after the race. Its listed at $319 a night on the marathontours.com portal. 2022 Boston Marathon - Hotels - Marathon Tours and Travel

I would recommend north end, Faneuil Hall and Waterfront areas are good with nice bars and restaurants with subway to convention center. quite a few options there. $350ish a night there. Honestly its worth it to be there.

Otherwise things go into $480-$590 a night for places like Ritz, 4 seasons etc. closer to finish.

When you stayed at Marriott Cambridge, how did you get to the race finish line (to get shuttled to the start) the morning of the race? Just walk the 2 miles?

It will save me paying an extra day of care giving if I arrive at Logan at 2PM on Sunday rather than Saturday. Do you think this is workable or will I be cutting it too close?