That depends though on the current value of the start up, which could very well be close to zero.
Say you could be paid $100 p/h at some other company, but instead your start up is paying you $5 p/h because that is all it can currently afford.
Say you can save yourself a weeks work by going with one hosting option that is twice as expensive but the total additional cost would allow you to work for $5 p/h for an additional two weeks then that isn't a great trade because the "value" of that labor is both unknown and irrelevant at this point. It might be $0 p/h or it might be $10000+ p/h.
1:1X dyno on Heroku is free, with a postgres server, and a free redis instance.
So even at $5/hr I can't justify doing this work myself at this point, since I can get the infrastructure for my minimum viable product going for free. I can and should spend my time focusing on developing the features.