Currently Renting (Sold a fix n flip a few years ago) looking to buy land with cash (30k or so) and put a new modular home.

So it's a waiting game for that property until you have enough to do a cash out refi.

The lender may figure if the borrower had this kind of money they’d be making the mortgage payments. 

This is from the BP rental calculator and is exactly what I'm wanting to see, just with extra payments each month. 

How will the partnership cash flow cover the HELOC payments if interest rates increase?

For some buyers it would end up being less than a 2.5-3% commish, and for others more.The tricky part for the buyer is it would have to come out of their pocket in addition to the down payment, whereas a commission paid by the seller at closing is included in the purchase price and absorbed into their loan (usually unless paying cash obviously) so the buyer only has to make the down payment out of pocket.

After 45 + years as a real estate investor, broker, lender, fund manager and syndicator, I’ve become aware that the “dream” of many investors and investor “hopefuls” is to be able to generate enough cash flow to live off their real estate holdings and accumulate enough wealth to make “work” optional.

If your rent ends up being comparable to your current mortgage, it might not give you the cash flow flexibility you’re hoping for.

Obviously cash flow would be wonderful, but not necessarily needed.

This could turn a potential loss into positive cash flow while protecting your property’s value.