I find your income for purchasing an existing property up to a maximum of 300,000 euros absolutely okay!
I bought a house with my ex 8 years ago. During the construction phase, we separated. With a net income of 1,550 euros (at that time single without a child and without a car) and an interest rate of 5.01%, I managed nearly 150,000 euros on my own. We also had 100% financing.
At first, I paid off 1% and when my husband joined, we increased the repayment to the highest possible amount and made special repayments annually.
If you really want a house and can do without this or that at certain times, it works!
I bridged 12 months with parental allowance, then stayed at home for another 12 months on parental leave without income, we still went on vacation, occasionally went out to eat, shopped, and maintained 2 cars. And my husband alone had 2,500 euros net.
I would calmly look around for a property that fits within my budget. Maybe you’ll find one from a private seller and save the realtor’s fee and reduce the need for equity for buying incidental costs.