Maybe you will be better at estimating, or more efficient with the work.

Things that increase or decrease your rent are things that cause the utilities to go up or down, such as size, number of shared walls, utilities, appliances, type of heat, any energy efficiency features, etc.

A Solo 401(k) plan is exempt from UDFI pursuant to Internal Revenue Code Section 514(c)(9).With the UBTI tax rates at approximately 40% for 2017, the Solo 401(k) Plan offers real estate investors looking to use nonrecourse leverage in a transaction with a tax efficient solution."

Not to be discouraging but being practical on finding a most efficient spot to spend your resources. 

So step 1 would be to define your investment criteria.Step 2 would be to start filtering on those large popular sites and finding opportunities that meet your criteria.Step 3 is to analyze those opportunities and become efficient at understanding what a good deal is and what a bad deal is.Step 4 is after building knowledge analyzing deals, to reach out to brokers in your target market, communicate your investment criteria and build rapport.Step 5 is to receive leads from those brokers, underwrite those leads and make offers at a price that meets your investment criteria while communicating with the broker why certain leads do not meet your investment criteria in order to get more targeted leads in the future.If you do these steps consistently, I believe you will have a good chance of acquiring a great property that meets your goals!

In addition to consulting a realtor; is there an efficient method to estimate After Repair Value in order to analyze deals quickly?

@Steve Stanley luxury vinyl is probably your most cost efficient option.

This is a guy that was making $10 in a factory before being fired for moving to slow.

Not sure about the sizing issue. but for sure if its a new unit it should have factory warrenties i would be having the HVAC contractor go back to the factory. really depends if the buyer will actually sue you... 

Year built will be much better (less maintenance ) Operation will be efficient because of the proximity within one mile radius (there is also no traffic in killeen) Terms are 30 amortized in fourplexes vs commercial - usually 15 -20 yrs amortized on older apt buildingsInterest rate is lower in residential - 1-4 units because its Fannie mae (a government sponsored entity vs a bank for commercial properties usually ) No balloon in conventional financing for fourplexes vs commercial properties (usually in five years a balloon - much much more riskier then what people estimate)Price per unit for fourplexes is better per year built (less debt payment meaning more cash flow)You have an ability to sell it to commercial investor in the future as a portfolio package with commercial loan but also an option to sell it one fourplex at a time for smaller investors.