Rigmaster is a good unit. 12,000 btu heat, 20,000 btu A/C, 4000 KW, and a 40 Amp DC charge to the batteries, and heat the engine.
You don't need an extra $7000.00, I know of companies that will help you get a Rigmaster for about $240.00 /month.
Output temps @ the discharge vent average around...