Grant,
I would find an enrolled agent for your taxes. Accountants are the worst thing for you if you are wanting to know what you can and cannot do. My tax guy is not only an enrolled agent, but is the president of the local association of enrolled agents. It costs me about $320 last year, with audit insurance, and I'm damned happy to pay him. I literally would not still be in business if not for him.
You can lump all your current assets in and depreciate them over time. If it's not a huge amount, you can probably depreciate it in a single year. BUT, once you do that, if you later sell one at more than the depreciated value, you have to claim the difference as profit and pay taxes on it. And collect sales tax.
Talk to an enrolled agent, you might be better off leasing the equipment to the business. Being a lease, the cost is a write off. And, the money your business is paying your private self is unearned income which has a tax advantage. A friend of my dad's ran a business out of his garage in San Jose for 20 years and leased the machinery to his business. He's not only a genius with high power electrical stuff, he really knows the ins and outs of legally keeping as much of his earnings as possible.
None of the above should be taken as legal advice, tax laws in Washington are different than California. But an enrolled agent will know exactly what to do to help you.
Couple years ago, I foolishly signed up for a Trump class. I'd attended a freebie seminar just to see if I could learn anything, wasn't really interested in playing in the real estate market. Wasn't going to sign up for the paid class until the speaker talked a big story about how the class would discuss doing business with the government and that interested me. Anyway, one of the tidbits I did get from the class was the overwhelming value of enrolled agents. I already had my tax guy lined up, but it was nice to learn I had the best guy on my side.
Jon