I have lenders that can fund in just a few days and are willing to finance up to 90% of the purchase price and up to 100% of the rehab budget, even for first time investors.

My question is, do I just use the heavily reduced price I was able to purchase it for since it was vacant, and then the material cost of what I renovated plus what things I did contract out, even though that basis would be way under what the other renovated houses that sold near me per SF sold at, or are you able to use similar comps to determine the depreciation basis?

Even with guaranteed rent, it's important to thoroughly vet applicants.

The overall LTV (including all 3 mortgages) will be key and your selling point will need to be that the 2nd mortgage ($8k) will burn off in 2.5 years (based on your surprise that it was even out there, I'd recommend that you follow up in 2.5 years and ensure that it's been satisified, so that it doesn't surprise you again in the future).Does the $8k grant vest over the 5 years? 

But balance is key—keeping some cash reserves for unexpected expenses is critical.Lastly, I’d recommend running detailed numbers to ensure the property cash flows well, even with conservative estimates.

Also, focus on 2 years of job/income stability.Class D Properties:Cashflow vs Appreciation: Typically, all cashflow with little, maybe even negative, relative rent & value appreciationVacancy Est: 20%+ should be used to cover nonpayment, evictions & damages.Tenant Pool: majority will have FICO scores under 560 (almost 30% probability of default), little to no good tradelines, lots of collections & chargeoffs, recent evictions.

Insurance is going to protect you financially from lawsuits, damages, total losses, and other scenarios we can't even begin to imagine until it actually happens.You'll want to have a broker you can work with and trust that will make sure you're properly protected in the event of a loss.

Some areas may appreciate, while others stagnate or even decline. 

My questions are;Do I have to take expenses as a deduction in a year in which they occurred even if I do not get income until the following year  I have other rental property, but my taxable income on them after expenses is only gonna be about $5000 So is there anyway to roll over expenses to the next year since I cannot deduct the remaining 15,000 and expenses against my W-2 income?

They even have awesome free resources as well.