Whew! Glad to see a lot of agreement here on what direction to go in!
Good idea about the cashier's check for a one-off job. And for regular checks - about going into the issuing bank to cash it or get a cashier's check - how do I prove I'm the business owner? This is stuff I hadn't thought of before (as if I was going to get paid in buttons or some other non-negotiable fund!)
And uh...what's a BAC?
I guess if I use Paypal, I need to set up a merchant account with them? Is everyone using the "Invoice with online payment" option? What if the customer doesn't have Paypal? Do they need to set up an account?
I already know I'll be forgetting things and making mistakes - I'm just trying to make sure the mistakes won't be too outrageously stupid - OR expensive!
Another dopey question - what should I be asking banks about setting up a business account? Is there something MOST important I should ask them? Or should I start a separate post for that?
Sorry to be coming off as such a dunce

- but my personal banking involves a savings account and a checking account. No ATM card, no debit card, no online banking - if I want to either withdraw or deposit money, I have to haul my butt down to the bank and do it in person. Very old school,

but it makes me stick to a budget.