I typically don't comment on other's businesses unless I know from personal experience.

I am actively expanding my STR consulting business!

Dig and remove around 200 square feet of an old concrete driveway, frame and lay down the concrete (concrete will be ordered from concrete supply business) and complete a brick ribbon around the driveway.

I will be able to log the 50% time of business use.

Many people choose NOT to have this, because the administrator will then vet every investment you make to ensure you do not invalidate your IRA.Invalidating your IRA means that you've done a prohibited transaction and the entire account is then deemed as distributed to you.If you don't want checkbook control, then I recommend a plan administrator such as Equity Trust - www.trustetc.comIf you are sure that you're aware of all the rules around prohibited transactions and disqualified people (who you can and can't do business with), then a plan administrator like Sense Financial would be a good place to start talking.  

Ask yourself: do I really have the knowledge of real estate principles, real estate law and real estate finance; the network of contacts; the experience both in business in general and real estate in particular; the time available; and the analytical ability to compete against FULL TIME EXPERIENCED PROFESSIONALS to be successful in a field where the failure rate is so astronomically high?  

Now let's say one or both people making the purchase owned a condo previously where they roll over the proceeds/equity into the new purchase and put 40% down.

I am currently a student at Florida International University, studying International Business.

@Jacob HavlovickBigger Pockets is a great place to find a real estate tax accountant.A good real estate accountant can save you thousands of dollars by leveraging entity selection and formation, tax deductions, cost segregations, bonus depreciation and tax planning.I recommend finding an accountant who specializes in real estate taxation, business taxation, financial planning and tax planning.You may want to consider working with your accountant remotely to expand your options.I would also recommend looking for a accountant willing to work with you throughout the year.

You can find qualified buyers that are small business owners, tradesmen, etc just have someone qualified to do prop underwriting be fore you sign the agreement.