I am using a realtor to sell another unit that I own but from the buyer side.

If you are investing in an entity, you should consider using a program such as Quickbooks.

Or keep it and buy other properties using a HELOC on the house?

If you’re seeking to obtain delayed financing on a property purchased with cash in the last 6 months, you can take out cash right away without waiting.However, if you buy a home using a mortgage instead of paying with cash, your name needs to be on the property’s title for a minimum of 6 months before you can take out cash and refinance your home.This is why buying properties with cash is so helpful for investors.

Just be aware that if you are using a DSCR or investment purpose loan in combination with your HELOC.

Get the tax returns reviewed by someone that does a decent amount of rental properties before rushing to using a higher rate/fee DSCR loan. 

Out-of-state investing usually means using a property manager.

Nothing wrong with using a pm, I just prefer to handle it myself and it really doesn’t take much time at all.

Hi All, I purchased a condo in Hillcrest area of San Diego that I'm using as my primary residence for now.

Might want to look into using a HELOC on your primary to fund some of the downpayment.