Beyond financing this deal, better credit will save you on insurance costs among other benefits. 

I'm thinking about putting my rental property with the same insurance company that I use for my primary residence so I can get an umbrella policy from them.

Usually you will pay for insurance on individual properties, and yes your liability and fire policy should be much cheaper than a homeowner's policy which is used for people occupying the home.

These include loan payments, taxes, insurance, utilities, lawn care, and any other costs that occur during the Rehab period up until the property is fully rented. 

I will assume you have insurance against loss but the quality of the ins company can make a HUGE difference, and god forbid you need to be made whole from a catastrophe you will wish you had paid a little more for a top rated firm.

I doubt that is enough room for taxes insurance property management (would likely be $240 on its own) vacancy, etc.

State LLCs, title companies, paperwork turnaround, agent customs, local banks, insurance.... this part was a little like building relationships in a foreign culture - even words are pronounced differently here.

Info: 20 units for $1.45MIncome: $17k/month :2 x 10 unit buildings (tenant pays electric) 4 x 2bed/1bath @ $900-$950 6 x 1bed/1bath @$700-$750 4 x laundry units Cap Rate 8.3Expenses: Property Tax $35,231.50 Water $9,450 Insurance $5,000 Scavenger $1,906 Fuel $5,954 Electric $1,247 Other $4,687

What does your insurance provider say?

Here's an example of what I'm talking about:Purchase price: $10,000Rehab (everything new): $40,000Total "all in": $50,000 (fully financed, 15 year note, 5%)Rent: $650/month.If I apply my normal formulas to it....10% maintenance (-$65)10% management (-$65)Taxes and Insurance (-$70)5% CapEx (-$35)NOI: $415Less debt service (-$395)Profit: $20/month.We haven't factored in vacancy.These are real numbers I'm getting from some investors in my market.