Hello Runnerrider16,
hard to answer. A few more details would be helpful (expected cold rent income for the 80 sqm; who would rent (stranger, family member (what is their financial situation), how much do you currently pay in rent yourself, how high is your current savings rate per month).
In my opinion, it will be tight.
Most of your equity will go towards incidental acquisition costs (property transfer tax, notary, etc.). Since you are buying from a family member, the broker fees will probably be waived (luckily for you). You probably want to furnish the house a bit (kitchen, etc.) - money will also be needed for that.
You should calculate with about 6% annuity (interest + repayment) for a loan. That means, for a loan of 200,000 euros, it is 12,000 p.a. or 1,000 per month.
Depending on age, this annuity can possibly be reduced a bit (= longer term) - but then after the fixed interest period there will still be a high sum remaining, which may have to be refinanced at a higher interest rate.
To what extent the bank considers potential rental income, I cannot say. It may also depend on the tenant (family member?) and the rental situation in the area (in Munich, due to the acute housing shortage, a quick re-rental can be expected when the tenant moves out - in Schleswig-Holstein???).
Two more tips:
- Besides the monthly credit burden, you also always have to plan for incidental costs (calculate roughly €2.50 per sqm). This cost share also burdens your budget (although you can at least pass most of these incidental costs on to the tenant for the rented part).
- Even if it is a purchase from a relative, you should have the house inspected by an expert beforehand so that you know exactly what you are getting into. This costs money again, but it will probably be the biggest investment of your life.