Prusa i3 are a good model as they follow the reprap schematics and are technically open source generally beds are 200 mm by 200 mm so that falls 50 mm under your 10inch requirement but the bed size is technically modifiable also keep in mind that the prusas are a hobby printer so in some cases will require some learning, as far as the body is concerned i would recommend staying away from any body made from plexiglass as it is brittle and will crack and isnt very sturdy, i recommend either lasyer cut wood body or aluminium.