boston real estate market

[Francesco Epifania]

hello, i am currently working with a bank to get a mortgage pre-approval as well as starting an application for a cash out refinance. i have one 2 family house free and clear, savings that i will keep as reserves to cover me. i am also working with a couple or RE investors that send me MLS listings on 2-4 multifamily units from in and around the Boston metro area. i haven't decided yet if i should do a cash out refinance or a home equity line of credit to invest in rental property. i am new to investing in rental property and would appreciate any advice. the markets are rather high here but most of what i am looking show positive cash flow after expenses.