Cheap for good reason; an A53 quad core is Raspberry Pi 3 class. Hope every package you're gonna need is precompiled for arm64 because building anything nontrivial is not going to be fun.
I had to do a lot of trial and error stuff to get it right, but anyway, I was having that spot instance sitting there almost idle, while using up the credits I got for free, so I had no issues with it.
The C5 instances are great for this kind of stuff.