Financing calculator with variables wanted

Hello everyone, we are at the beginning of the idea to buy or build a house. For us, the first priority is the question of what we can afford and what we want to afford. Since we do not have the normal financial situation, I am looking for an online financing calculator where I can make a few flexible settings. For example, in 3 years we will have rental income, but not yet, and in a few years we will receive money that we have invested securely. Is there such a financing calculator that can be fed with more information? Thanks in advance.

Thanks first of all for the quick response. Yes, in the first step it's about a rough calculation of what we can afford. However, I think since the future rental income comes from the current apartment, the bank will surely include this in the calculation. Which calculator can you recommend for me?

You guys are really so cool. An online calculator is being looked for here and NO ONE helps.

Thanks first for the quick response. Yes, in the first step it’s about a rough calculation of what we can afford.

You guys are really so cool. An online calculator is being searched for here and NO ONE helps. First, nicely again say why this and that doesn’t work or just scribble “Excel” in the “draw the Rest of the f****** owl” style.

you are not allowed to link and refer here, but just google "profitool Baufinanzierung", the first hit should bring you to a very detailed calculator where you can set repayment rate changes and special payments exactly by date