So I've been poking around the forums a bit and I think I've managed to mostly just confuse myself more....
Given that the goal here is FIRE: I am currently debt-free and renting, and am generally of the opinion that I would like to own an apartment. I picture real estate being part of my investment portfolio, and I admit to also having a bit of an emotional pull towards owning my own four walls, especially since my apartment building is now coming under new management and I've heard lots of horror stories from friends about being strongarmed out of their places. I'm generally figuring that my best bet will be to buy an apartment in the direst need of renovation I can find with the best price, keep living in my rented apartment until the owned-place is liveable, then move in and finish it up. Either rinse and repeat the cycle if I decide to move, or buy further apartments and renovate and then rent out for income. I'm not imagining being some kind of real estate mogul, partly because being a giant landlord sounds like a lot of work, and partly because I don't have a huge amount of capital to work with off the bat.
So given that... Right now I'm sitting on a decent amount of cash (about 30% of the imaginary purchase price of my imaginary fixer-upper, by my estimates, but I'm in Germany, where it's more common to do something like 50% down rather than the US 20%), and... I feel like I MUST be doing it wrong. It's straight up in a savings account. But once I actually buy the place, I'll not only have no savings, but a huge debt that will need paid down. I can't really invest in the meanwhile though, I think, because my timeline is to buy int he next 5-ish years.
So how do I go about saving for both ER AND a mortgage? I'm paying into the state-retirement-scheme at the mandatory rates, and the employer-offered pension scheme at the basic rate (I don't quite understand it, frankly, but I'm working on that), and on top of it I have private "retirement insurance" which I also don't fully understand, so my after-67 years should be amply taken care of. What about years 35-ish-67? How do I do that?