All good points. Just beware most accelerators will want owners to give up equity/autonomy in exchange for knowledge, equity, money. Others to consider when choosing this route include:

http://www.seed-db.com/accelerators

Below, electronics HW startup timeline for hardware entrepreneurs/founders/portfolio company executives with links to other helpful content:

https://www.ventureoutsource.com/contract-manufacturing/benchmarks-best-practices/electronics-assembly/startup-company-product-contract-manufacturing-and-design-

When contracting electronics manufacturing services (EMS) or original design manufacturing (ODM) services, good rule of thumb regarding the provider ideal target price (quote) v his ‘cost’ for your HW program will be 1.5x BOM cost. Lower if he sees your product can yield immediate operational improvements to drive EMS/ODM margin and/or, also if you have a compelling product.