Need advice on travel trailer tips on buying one to live in.

Westend, do you have a link for the accessory items?

Nope,sorry.

Skirting can be as simple as foam board taped or secured to the trailer. There are also after-market vendors that make an insulated blanket that snaps onto the siding.
The shade cloth is available at big box stores like Lowes, HD.

One way to find a fit for your use may be to visit an RV campground or park and ask a few of the full-timers what they like or dislike about their rig. RV'ers are, for the most part, pretty friendly folks.