House today or continue to save and postpone?

We currently live very cheaply renting for €450 cold and €720 warm. However, the apartment is in the attic and the roof is not insulated. This means it is very hot in summer and cold in winter. Our goal is definitely to own home at some point. We are now considering buying a semi-detached house for €350,000, for which we could bring in €200,000 in equity. Since we are currently renting very cheaply, we are wondering whether it makes sense to stay a few more years in the current location