

No, you should probably collect your documentation and engage an attorney. Money in an HSA is yours, whether you leave the company or not. Your contributions need to be made while you’re covered under an eligible health plan, but once you’ve made the contribution, funds are yours forever, and can be spend on any eligible expense in the future.
I can’t speak directly to your location, but you may consider flying inspects in your design, either via screens, fans, inspect repellent or otherwise. The grills and ovens are generally fine, but the work area could attract insects while you cook.