Well, hello to you Diana, and welcome to the forum...in reading your post, perhaps you meant to say NuWa Champagne and not New Horizons? If you did mean NuWa, they are no longer in production, but you might check with the former factory in Chanute, KS, for inventory. The NuWa HitchHikers were very well built and would compare favorably to any Keystone model. Kansas RV Center is the place to check with.
As to going full-time--my wife and I did just what you are planning--we sold the house last May and went full-time in a new-to-us DRV fifth wheel. Have you looked at DRV models? Have you looked at RVTrader.com? How about PPLmotorhomes.com? Both these internet sales sites have plenty of info on prices for almost any type of RV.
Good luck in your search.
2016 Tiffin 40 QBH
2015 38RSSA, traded
2005 TK3 #1869, 10 yrs of memories,
2017 F450 KR--one more Ford is it
2009 F450 4x4-died; 2010 F450-retired