So, on the outside we replaced like for like with approvals on materials, colors, etc. 

Depending on the price point you're looking for, consider areas to the north that are developing as alternatives to Winter Park: Altamonte Springs, Casselberry, Lake Mary, and especially check out Sanford which is about to go through some good growth-already actually happening. 

I am looking for references for subcontractors(master plumber, electrician, framing, siding, drywall..) and also materials for new construction.

Please be sure to select a Solo 401k plan provider which allows you to take a loan and will prepare the required 401k loan documents.The repayment terms are equal monthly/quarterly payments (as you prefer) of principal and interest (e.g. prime + 1%) spread over a 5 year term (or longer if you will use the loan to purchase your primary residence).There are no prepayment penalties and no restrictions on what you can do with the proceeds of the 401k loan.Please note that you are obligated to pay back their 401k (regardless of the performance of your real estate investment).As an alternative to taking the loan, you could even purchase the investment property directly using funds in your Solo 401k (assuming you select a Solo 401k plan provider which allows you to invest in real estate).

However if a replacement is a meaningful upgrade (and value-add) from the original material or item, CapEx. 

Great material!

I recently closed a multi family refinance deal. As a retired person I didn’t have many financing options for a difficult commercial deal and had to pay higher financing costs. Other than having cash on hand and absen...

My partner paid for all the materials/tools. 

They meet monthly too, alternating between Burlington and Worcester.

@Daniel DietzGet an appraisal.If the IRS questions the value, you have an acceptable value and no issues.Defending any alternative form of valuation with the IRS, even if you are successful, will cost much more than the appraisal.