Any experience in purchasing smaller, tax heavy CPA firms?

Looking into buying a small CPA firm (tax heavy with individuals and businesses). Ultimate goal is to purchase more than one but starting small. My background includes tax but also consulting and corporate finance/accounting roles, therefore ability to offer additional services. Wondering if there are others out there that have gone down this route, specifically with smaller tax heavy firms. Would love to hear success and failure stories of things tried. Some things that come to mind are 1) technology enhancements for efficiencies (AI for prep work? Data entry?), 2) employees (part Time, remote, vs full time, offshore, etc…), 3) transition from owner who has long term relationships. 4) additional services added - bookkeeping, compilations, CFO advisory, investments, recruiting. Current opportunity firm still has some clients come in person, some use paper, not fullly utilizing the system (don’t have fees for invoices in the system, etc…) first thought is this is a good thing but concerned if make changes too quickly some of that clientele may not like the changes. Short term, selfishly, would love to get any advice and thoughts on the above. Long-term, perhaps having some people to bounce off ideas, wins, and struggles on a routine basis would beneficial. If anyone out there is willing to reply and/or have a chat it would be very much appreciated. Thank you, Ian