You don't technically need a lawyer, but I would advise you to retain one.

Even if raising money with a convertible note, and using the community documents, you'll still need someone to file your Form D, prepare your board consent, and ensure all i's are dotted and t's crossed. You don't want to run afoul of the SEC.

Is your corporation established? Are you authorized to sell shares?

If you bring your own paperwork, you should be able to get away with <= $5k via a negotiated fixed price or cap on the legal work.

Some firms are also willing to defer payment up to a certain amount and/or until you raise additional funds down the line.