.: I would go HELOC for sure that would be best as others were saying the lower cost for the money changes between paying a higher rate for a personal line and typically personal lines they want a higher monthly charge as well independent from the interest rate.  

For example, here in NE PA, you can buy a 4/2 on a lake for under $500K while in CA, $500K will get you a starter home in most cases. 

Here are some examples:  1.

For example, ask about typical costs for HVAC repairs, plumbing issues, or roof work.- Use Historical Data: If the seller has accurate financials, their expense data can be invaluable.

I researched commercial construction careers, and found a construction degree is typically required.

You can borrow  against a 401k or another property you own for example, but that would a secured loan.

Renting out the property for less than 180 days in the first year is typically one of those conditions, as you've mentioned.

This is an example of private lending which is different than the IRA owning real estate and does not trigger UDFI/UBIT tax.

And that's a very simple example but you get the point. 

Other KPIs and considerations you should evaluate when talking to any lender who offered private placement of loans/notes are historic default rate, how quickly they can place your funds (do you get preference over their income funds, for example), average interest rate - borrower note rate and what is passed through to you, are loans serviced by a 3rd party servicer or in house.