I'd be fine with more expensive host IF it would fix the problems but like i said with 2gb ram version 4.1 still works way worse for me than version 4.0 with 350mb ram.
I'm sure that the 4.2 will bring a lot of improvement. So you can stay at a pace less until that things will be better. Don't forget, such migration to the asp.net core is not easy at all.
Nop is doing a great work that will be so beneficial for all. We all know the power of asp.net core