It's actually harder if you are currently living in the property, want to cash out, and then have it as a rental as you haven't proven to the bank that the property will cash flow $600 a month on top of the NEW mortgage costs.
1. Do you need this place to live in, or can you rent it out and have somewhere else to live?
2. Is the 75k from your DTI restraint from the bank? You have a 200k equity buffer, so you should be able to get closer to 130k from a LTV perspective - but will your rent amount cover that new loan?
2. If you can rent it out, get it rented out, get a year lease, then start approaching commercial lenders for either a DSCR loan or a 2nd mortgage, with cash out.
Personally due to the rate environment, I am sitting at 65% LTV on my properties, but I also stopped buying and started private lending (in the US at least, I just bought a house in Portugal).
You're in a really good position here, it'll just take some math, homework with banks, and diligence in renter underwriting to end up with a fantastic income property and portfolio.