I saw you were thinking about what to do about a livewell. I stumbled upon this one day at walmart and I was wondering if this would interest you. I do not own one nor have I ever seen one being used in person, but it seems to be able to play many roles: fill/empty & aerate live well, wash down boat, bilge pump. I have considered buying it many times but haven't just because I do not really need a live well, however the wash down & bilge would be nice.
https://www.walmart.com/ip/Super-Saver-12V-Livewell-Kit/16503166
Super Saver 12V Livewell Kit:
12V aeration and pump system
Fills, aerates and empties any livewell from the water supply
Adjusts to any size of insulated chest, livewell or container
Produces 99.5-percent saturation of dissolved oxygen
Spray bar mounts with suction cups
Fits both round and rectangular livewells
Can be used for wash down or as an emergency bilge pump
Aerates 20-25 gallons of water
Works with fresh and salt water
Kit includes: 500gph pump, suction cups, 10' copper battery clip cord, 2 aeration spray heads, mounting brackets. 5.5' flexible tubing, fish foam filter, stainless steel screws and suction cups for mounting