If you could please tell me a realistic (not "the sweet deal you get") number for what the average cost of one or more of these things in your area is, along with what area you're in, I'd be very grateful! I'm doing a bit of research in order to come up with a more accurate CapEx/Repairs rule of thumb for myself for Buy and Holds in more expensive markets, like the Southern California area I live in.

A basic toilet from your local hardware store?

A water heater?

A roof? (Including type.)

My belief is that using a flat percentage across all markets is pretty inaccurate (and not to bash on the 50% rule of thumb, obviously it's just a rule of thumb, I'm just trying to refine it for my own specific area.) My belief is based on the fact that I don't believe the average cost of a toilet is all that different whether it's here or in another state.

If I budget 10% for CapEx/Repairs on a $1500/month 3+2 in [pick a state] vs. a similar 3+2 in my area that rents for $3,000/month, I do not believe that item in my budget for my area merits a 200% increase. Simply put, I don't believe labor and materials in my area are twice as expensive just because the homes here rent for twice as much.

Thanks for any and all input!