@Bony Mathew
I would always recommend a refinance. You will be able to get a lot more cash out for the subject property. This will allow you to grow your portfolio much faster with a "healthy" amount of debt. If you are looking for a single loan for each property you own, there are limited avenues out there, but we are diligently trying to change the landscape.
Some important things to ask yourself about each property before pre-qualifying for an Investment Property Loan are:
a) Is the DSCR greater than 1.25x for each property?
Private Lenders offering this loan review the actual property's rental income and not your personal income to qualify you for the loan
b) How much are you looking to get a loan for? 60% LTV? 70% LTV?
c) How quickly do you need to close?
These lenders often close within 3 weeks but usually charge a rate that is >6.5%.
Feel free to reply here or reach out to me directly if you have any additional questions.