That looks like the "normal" number of connections sort of. But the arrangement is different than mine that is for sure. I think I have 2 T's in that compartment. One goes to the fridge
. One goes to the stove. I would assume a hot water heater might add another connection.
The other thing that is different is my line is running along the floor (along with the wires) and the T's branch "up" and line continues along the wall to get to heater. Don't know if this would have been stock on your year/model or not but it would seem safer than running the connections up the side of the burner.
I also noticed the line running back and down through the floor appears flattened a bit from the bend. Not desirable or indicative of good workmanship.
Anyone with decent mechanical aptitude (or even with little) can do a lot of the work and maintenance if they are willing to learn how. If you have never used a pop rivet or removed one, it's not hard but you do need to know how if your going to do it well.
Practice on scrap, have someone show you, watch YouTube videos. Whatever is appropriate to the task. Electrical
I'm not sure I would take on with no knowledge and a YouTube video given a choice.
Camper equipment has certain safety requirements, or knowledge required for safe and successful operation. So if the equipment or RV's are new to you consulting manuals, asking questions, and seeking the advice of professionals is how you gain that knowledge. Or at least how you gain it without a lot of painful and often expensive experience.
If you have never installed a propane
line getting someone that knows how to come over and act as a mentor is a good idea. Once you know how that knowledge is yours forever.