Maybe. Have you spoken to the sales staff? I talked to them before purchasing with the new pricing 2 years ago and they said that the Pro version is still the desktop version and iPad version and web or chrome version. You do have to upgrade yearly if you want the improvements and upgrades but not doing so prevents updates and improvements. As explained to me you do not have to resubscribe to continue to use it.
That said I can easily fit $300 per year into my budget. It pays for itself many times over with the first job each year.
One thing that is important to me with Sketchup Pro is that I can customize the lay out, icons, short cuts, etc. IIRC the web versions do not allow that.
BUT if this other program will write directly to SVG that saves a step. And if it draws better that may be better for you. Also, I have drawn caster wheels on Sketchp, converted to SVG on Sketchup and Cut those casters out of Baltic birch with my Shaper Origin. They were round.