You can do anything you have/want to do. I never built a house before I built this one. I did everything on my house from bricking, slab, shingling, electrical, plumbing, sheet rock.....all of it. I saved tens of thousands of dollars building it myself and taught the boys how to do all of these things though they didn't appreciate it at the time. It helps to have a friend that knows but much you can get right off the web. It is a LOT of work though I will admit but personally I enjoyed building my house and the shops but there were those moments.

@kgoodyear I salute you partner. ?

Expensive is relative. It's expensive initially but the payback is pretty fast. I am also going to apply for a credit on my gas bill. They are now making them that mount to the outside of your house. Very easy especially if you plan ahead with your plumbing.

To digress, I might also suggest you study very carefully before you build a tiny house. I believe they are over rated and not a good idea. In many areas you may not be able to pass code with them and you may not be able to sell your property with one as a residence. They can be problematic.

@kgoodyear Thanks for the info. The tiny home I'm looking to build is on wheels so it will be moveable. I just want something smaller and no mortgage. I've been doing a lot of research on them and have read the pro's and con's, and so far it seems like it will be a good fit for me. And since I'm having it built on a frame with wheels I can move it if I ever need to.

@Redheadedgammy Sounds like a plan. Be safe.

I have a 1" feed line with a 3/.4 T to the heater. They don't make 3/4 flex pipe so I hard plumbed my gas feed. My cold and hot water are all 3/4 because they are going to a manifold where it splits it out in 1/.2" lines. Basically, the high efficiency ones preheat the water and then run it through a core that works like a radiator in reverse. When there is a demand, the burners come on immediately and this new one sounds like it has forced air mixed with the gas to make it even hotter and burn more efficiently. The exhaust is PVC and only gets warm. This eliminates the much more expensive double wall necessary for the lower efficiency. This one is .92 efficiency.

Ok, so I don't like repairing septic lines!

I really like doing plumbing. I built my house so I had reasonable access to all my plumbing. It helps when you built the house yourself. You know how everything is put together and you make it easy for repairs.

I think I had 4 or 5 trips. Fortunately I live close by Lowes!!!

@kgoodyear
That’s typical for most any job I do

With a guy like me around to show you the ropes you can!