No offense but this is a stupid approach.
It's not. Believe me. I, for one, hate digital books. But let's even say I love them. I know so many people nowadays. Do you know how many use kindle that I know of? Zero. And I'm not even kidding. Seriously.
What does the $1500 euros get you? How many copies?
I have one offer for now and I'm waiting for the other but I don't expect much different numbers. That sum would grant me 500 copies. There's a chance I could lower that cost for 200-300e in which case I'd do the design (aka my friend would draw me the cover) and I'd finish page break myself in Indesign. I actually 95% did page break already, but it's in Word and I know publishers usually use Indesign due to different formating. But, believe it or not, they take quite a lot of profit from sales cause they'd have it stored in shops in the town. So it's not like I'd have all the book sitting at my home. Sadly, they do ask for a lot of %