I can't comment on build quality, but this Keystone Bullet model might work. 2510BH, no slides, should be F150 towable (properly equipped F150). The lack of a slide makes it lighter, 3 adult sized beds as well, plus couch and dinette.
Keystone Bullet 2510BHI am not in the RV industry but routinely find myself at a RV supplier in Goshen, IN. Multiple sources there (including talking to locals in the RV industry at restaurants during lunch) lead me to believe that Coachmen Freedom Express models are above average in build quality. They are built by a mature plant of employees. The Catalina line apparently is built at a different plant, newer employees, not as good. Not saying they are bad or even below average, but the Freedom Express models were flagged as better in my conversations.
This one has a slide, but might work.
Coachman Freedom Express 25SEI also agree with many of the others, as much as as far as you will be towing, a 3/4 ton truck will be appreciated. I think a well equipped F150 could possibly work but you may end up payload limited with 4 adults depending on how much they and their gear weighs.
Good luck!