This includes raising a roof, running electrical and sewer, installing a bathroom and kitchen and finishing everything off.

On the other hand, not dealing with roof, pipes etc damage is a big deal for me. 

We added value by installing new HVAC, roof, electrical, & much more!

Are there any major repairs that are coming up in the next few years (eg new roof)?

Given the expenses I foresee in the future (lots of dead trees on the property, HVAC won't stay new forever, roof with about 10 years left, high renter turnover in the area), I am not sure if my cash flow will ever be positive. 

Last  month I had a leaky roof that was leaking in two different areas on my wood floors the day my guest arrived..on a Sunday.

A few things they mentioned were solar partners, pool company partners, roofing partners, etc.

While I prefer newer homes with tile roofs and stucco siding in good residential neighborhoods. 90% of Vegas SMF is the opposite.

Also properties built in the 80s that were considered to be "newer" condos are now having system failures, specifically roofs.

If the cash flow on the existing properties goes close to breakeven, seems like you would be increasing your risk of large capital expenditures, like roofs or heat pumps, without cash flow to sustain them.