Stash away as much as you can for cash reserves.

I own an office building with parking spaces reserved only for tenants and their customers during business hours.

Wow that was great insight Jonathan thank you.My biggest concern is simply not having an income of reserve while going to school and capex or expenses putting me underwater. 

Can those who operate in texas confirm this.Been buried deep in learning land investing for past month and just looked up and realized its Friday night & I am still reading texas law..ha. 

Are you assuming holding no reserves for maintenance or capex since you just refurbished everything?

But ultimately I keep plenty of cash reserves so that I am never forced to sell prematurely.

If that's an accurate quote and a structural engineer confirmed it was necessary, I would recommend you plugging it into the calculator as repair costs and see how big of an impact it has on your projections.

They're on an F1 visa, and I've confirmed their validity with the school they are attending. 

I would confirm that first. 

If you can't find the leak after confirming it exists, call in a good plumber.