To vac or not to vac

I saved up a little cash to upgrade some of my equipment so I can get things done faster. I'm seriously considering getting a vac form table (and I'll make a heat source) I feel it will be a less expensive upgrade compared to resin and silicone and be a little more versatile for a little less money. Also since I do a lot of toony stuff and heavily foam out things the lack of detail isn't a big deal. A few questions.

I've been wondering if it's possible to vac form claws. It should be but I could be wrong.

How big should I make the table?

Does anyone have a good reason why resin would be absolutely better to invest in.

Anything I should be aware of before I decide to do this?