My investment partner and I gave ourselves two years to learn about the many intricacies, and niches about REI.  

However, the urge to invest, flip, wholesale, buy and hold, has been there waiting for its glory day.I was born and raised in Carmichael, CA so I am very familiar with the nuance and intricacies of this area.

If you were working with an agent, you may see if their broker can give you some guidance on the state/contract specific intricacies. 

A lot of neighborhoods can be street by street here with many different intricacies so becoming an expert in the local geography is definitely valuable prior to starting. 

Numbers may look good on a spreadsheet, but if you don’t understand the intricacies of a market, you could make a fatal mistake in your analysis.  

Disclaimer - not suggesting this will replace professions, just sharing my experience - As a landlord(lady) of multiple rentals, I need to understand the intricacies and this book has given me a very good understanding of rental taxes!

Definitely recommend that you talk to a 1031 QI who can help you work through all the intricacies.

I ALWAYS include management and vacancy when calculating CAP rates which is why realistically you are not going to find anything of quality over on the MLS  with over 6% in Fresno - typical buildings here are getting closer to 4.5% to 5.25%  - that's also the reason why I never pay attention to the numbers provided by the broker or the seller - I mean sure , I will look at them and run some numbers - have a good laff when I realize they have not included any major expenses and run their property for 4K a year ..lol. but then I look at what the actual expenses are likely to be based on experience and look at the REAL potential for rent and run my numbers based off of that  - of course not a lot of properties will show a good cap rate when you do this - but I feel that it is more realistic and I don't have BS anyone when it comes to what a property can generate - I don't have to go back and adjust numbers for things that weren't taken into account initially - keep in mind that most real estate agent don't even own any property much less investment property  - try to work with someone who has their own investments and understands  the intricacies of income property.

Are there any additional taxes, paperwork, or intricacies I should know before I approach a wholesaler to buy some properties?

If that is your only way to get into a deal, a deal where the numbers work, then it is totally worth going through the paperwork and dealing with the inconvenient intricacies that might come along with FKA/203k.