Looking at a gulf stream conquest 255 with slide out and a 25lx heartland prowler no slide out. Rest of the features are about the same. Price the same. It's me my wife 2 girls 7 & 10. Plus two big do...
"Sooner or later" something always breaks on an RV. Quit worrying about what is going to break before you buy the dang thing. By all means, make sure you can operate it manually, but base the decision on whether or not you like the extra room and openness a slide provides - not some unforeseen issue you may or may not have.
Tires on TT's are more prone to failure than slides - will that affect your decision?