As stated, Palomino is a generally a low-end, entry level camper (and that is not a slam against it.) But at $500 if you can get a couple of years out of it then it will give you a good idea of the TC camping lifestyle to learn if you want to take it further and step up to a better quality camper down the road.
There are many places where you can purchase common standard parts... Amazon is a good source.
In my opinion I would put money into small simple less expensive things such as the table top mechanism of which you mention, but look closer at the larger items such as the jack mounts or the lift mechanism and evaluate the safety factor vs. cost in order to determine if it is worth spending money into.
I had a '94 NorthStar pop-up years ago and learned the hard way about the lift mechanics and how it was fastened. the rear part where that stuff attaches to the lid was a weak point on older pop-ups if it starts to weaken from rot...This is my canned reply about pop- ups:
The one thing that I would keep a close eye on the pop- ups is the mounting plates at the rear of the top portion of the pop- up roof. The easiest way to see what I will describe is to look at it with the roof about 1/2 way raised. Have someone inside to keep in in this position while you inspect so that it does not fall on your head.... Look at it from the outside at the rear. Push in the fabric and look at the underside where the metal plates attach to the ceiling portion that raises. You will see what looks like plates that are attached to the top roof. There are screws that fasten the metal plates to the wood. Keep an eye on these!
I had one where the screws gave out from rotting wood and they rotated up penetrated the metal roof
I ended up fixing this, but it was not an easy chore as the tension of the mechanism was tough to overcome to bring the plates that rotated back into proper position, beef up the wood and bolt it all into place.
Welcome aboard and have fun with it... even if it might be for less time than you hoped for.
