Turnkey Rentals and Legal Review

We are looking at turnkey rentals for our first investment property.  It seems to me that the purchase contract would be sent out and expected to be returned, signed, within 48 hours or the property would be listed again for other investors.

Should this be enough time for an attorney to review or is there zero wiggle room with turnkey contracts? Sign or move on.

Just want to make sure I'm covering all my bases and not opening myself up to an issue in the future.

If you have any turnkey experience please let me know how you handled attorney review of the purchase contract.

Thanks