Hey man, thank you very much for your answer. Maybe I take some part of my budget for long term renting. But by now I will keep as much DEC as I can for SPS airdrop and try to get some Vouchers if I can. By the way I have written a post to optimize buying process in peakmonsters.com, would u mind having a look?
https://www.splintertalk.io/@beffeater/optimize-your-budget-with-peakmonsters