As a former Due Diligence expert I would say you could do some of the work where you are an expert but not in all areas (i.e. in my case financial would be covered but legal, tax or others would need to be done by others). Additionally, if you do it yourself you lose the review aspect. I think your skills are better used by being very specific about the issues you want analised by third parties and selecting the right consultants (thus ultimately saving costs) rather than doing it all yourself.

Hey Ryo, I've done large chunks of preliminary DD and latter post close with the help of my partners and board advisors at the time. It's definitely important to have expert advise to ensure that you don't miss anything, but I also believe it's important for you as the acquirer to know what the DD process is like and analyse P&Ls, balance sheets and assets. Also especially when you start out, doing some of the grunt work keeps costs down before you are fully committed to a deal. Once you're sure, then you can bring in the experts. Hope this helps!