A HELOC is essentially a high limit credit card that you pay yourself interest on.

Many investor raise prices until they have somewhere from 60-70% occupancy to maximize profits.

My husband and I decided to do a cash out refinance to raise capital for additional investment properties.  

There are also plenty of places that have caps - let's say the sales price is 50% higher, and the county might even want to raise the property taxes by 50%, but there might be a law in place that limits them to raising property taxes 10%/year.Lots of people do what you're talking about, especially commercial real estate and mortgage brokers.

If you want to boost cash flow by cutting down on insurance, just raise the deductibles. 

We want to raise the rent and also do our own screening of the current tenants to see if we even want to offer them to sign lease agreements with us. 

For a conventional mortgage, (the loan type best suited for your plan), you will need more than twice as much monthly income as monthly debts (including the new mortgage, student loans, car notes, credit cards, etc.).

Too, rents have skytocketed here and a very significsnt raise is called for with new tenants.

We all know the fed will raise interest rates in the next few years.

I know this is outside the box, but is it possible to raise investor funding on a primary residence?