This is a weird niche project that i've been thinking about for a while. I have a portable record player that works great for multiple speeds, and i've used in in the yard several times to listen to records, but it's kind of a drag to also string out a power cord.
I also have a wind-up 78 player that works great, but it uses steel needles, which only works with acoustic 78s, those needles are too rough on the later electric recordings.