Purchase Agreement Review

I am a self-funded searcher under LOI to acquire a business, and have drafted a purchase agreement based on a template from a previous deal. I would like to do as much of the upfront work as possible myself to minimize legal expenses, while still ensuring the docs are clean.

Is it reasonable to have our counsel simply review and adjust my effort at the purchase agreement draft? How should I think about the impact on legal expenses, if the initial seller draft requires minor edits from counsel vs. a build from scratch?

Any recommendations for effective ways to run this type of legal doc execution process would be appreciated.