Learning how to estimate rehabs based on labor + materials is massive.

Estimated total cost of rehab is between 100k and 150k.

Are you estimating CoC with just the down payment & closing costs? 

You could integrate with Zoho CRM, and it'll work very well especially for invoicing or sending estimates, etc.

I’ve been quoted $20,000 to build the pond, which was a rough estimate.

The other disadvantage of storage rental is they are generally slow to fill up, we are financing a new Construction self storage, and the lease up is estimated at 4 years.  1 suggestion would be to buy 1 container, lease it, then buy the subsequent container.

The neat thing about buying the STR subsequently, is that you can use estimated short-term rental income to help qualify for the STR purchase, but only if you purchase the STR after your primary (not the other way around - see Scenario 1 above). 

Planning is key here to determine your estimated income and how much gain or recapture each property may produce.

However i have a few questions to make sure my numbers make sense.I have spoken with a lender and estimating 8% rates.

Since lease was just renewed and he has almost a year left, I would think the amount should be 2-3 months' rent plus estimated moving expenses.