I recall a guy on Rennlist being one of the first DIY'er of this on a 996.
He had no experience taking down a transmission or a jack to do it.
He fab'd up his own RMS removal tool out of pvc piping.
He otherwise had no special tools but granted he was also 928 owner so he had experience fixing things a lot.
Given the critical nature of this job, I would wait for your indy or give him an extra incentive.
IMHO there are DIY jobs that will only be done once so best to give it to the guy who has done it more than once.