Vps can be really inexpensive, I pay $3 a month for mine
gungho4bungholes
Another option is Alibre. It's a one time purchase and fairly reasonably priced but windows only.
I purchased it about 18 months ago after getting tired of being frustrated by solid works makers hate for its customer.
The makers web ui is impossible to navigate, and Why do I have to log back in and decline cookies after every fucking 6gb solid works update?
With Alibre it never expires, I can use it commercially, and it has 99% of the functionality I need including sheet metal.
I use this in my house, it's great. I chose this over others because it allows defining the url path specifically. (Domain.com/whatever)
I have all my pdf manuals and docs uploaded to Paperless ngx. From within Paperless I make them externally linkable.
I take those long nonsense links, shorten them using chhoto with meaningful paths (like /mitersaw) then convert all of those to qr codes that I print out and stick to whatever object is relevant.
Say if I'm working on my chainsaw or whatever and need the manual, point my phone at the qr code and open the manual from my network for my exact model.
Bambu made 3d printing an appliance. Before Bambu there is no way my ~65 year old mother would be able to own and be self reliantly productive with a 3d printer.
Prusa was close, but comparatively much more expensive.
I don't and won't own a Bambu, but if nothing else they opened the world's eyes to what is possible, now hopefully more friendly companies like prusa will learn from it.
Technitium
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I don’t think that would solve the cgnat issue. I use a vps because I don’t want to pay 250 a month for a starlink routable ip