I am new to the ebike world and my next build is going to be a 60 or a 72 volt chopper
If you really depend on your ebike for transportation to work, I would concentrate on getting a second ebike, and make it one that is extra reliable.
If you save up some cash to get good components, the most happy ebikers seem to be using 48V X 25A = 1,200W. More power is more fun, but...more power is also more expensive. 1,200W seems to be the most fun-per-buck sweet spot. A 60V or 72V battery is VERY expensive, and if it ever has a problem, it will result in deeply anguished tears of sadness.
A 1,200W geared hub will weigh less and roll easily when you pedal with no power on, also lighter to lift onto a bus bicycle rack (if you need that). For 1,200W my favorite suggestions are a Bafang-BPM and a MAC. If you want to save a few bucks, get the BPM, but add a temp sensor as soon as you can afford, to prevent damaging anything from too much amp-heat. The MAC has about 20% more copper mass, so it will run a little cooler at the same amps, but...it also costs more.
A direct-drive 1,200W system will be slightly cheaper (yescomusa, 9C, etc), and it can take much more than 1200W if you want to hot-rod it later (lots of copper mass). It will be heavier, and it also has some magnetic drag (cogging) when pedaling with no power on. One benefit of DD hub is the option of regen-braking. The hub will temporarily become a magnetic brake, so...the hub will slow you down on a steep downhill while your stock brakes stay cool and ready to add more braking if needed.
The most expensive part will be the battery, and a high quality 48V battery that comfortably puts out 25A is going to cost a lot. If you build up a second ebike with 48V, I would then work on saving up for a third, and then sell the first one (which sounds like it has been unreliable, and will likely continue to cost you in ongoing repairs). Over time, this plan will result in two ebikes that both use 48V, so the two bikes and batteries are inter-changeable if one of them has any problems. Charger go bad? you have two of them and both batteries are 48V. Throttle acting weird? you have two of them...etc
Best of luck with whatever you decide...