Hi BP world, I am currently not taking a home office deduction since the entire space I use in my primary residence for my rental business is also used for personal activities (computer, file cabinet, office desk). 

Turn off the computer, tv and radio and actually interact with people in the real world.

THERE IS ABSOLUTELY NO CORRELATION TO PURCHING YOUR OWN MATERIALS THROUGH YOUR OWN CHECKBOOK OR CREDIT CARD AND THEN THIS MAKING YOU LIABLE TO A CONTRACTOR AS YOU DESCRIBE WHO IS NOT PART OF YOUR BUSINES, IF I GO OUT AND BUY A BUNCH OF COMPUTER PARTS TO BUILD A SYSTEM, AND Mr.

Has anyone used Carbonite for their computers back up?

Neither of those.First, ignore your rental income and expenses and just get your base DTI:DTI = (total debt payments including residence) / (total gross monthly income)If "Condo" refers to your residence and you have no other debt and all income is from W2s then this is:DTI = (condo PITI) / (W2 income)Now, factor in the rentals.First compute net rental income.

Are you near a computer?

Payroll & Related Salaries - Management Salaries - Leasing Salaries - Maintenance Overtime / Inconvenience Wages Bonuses - Incentives Leasing Commissions Temporary Help Employer Related Payroll Expense-ADM Utilities expanded: Utilities Electric - Occupied Electric - Common Area Electric - Vacant Water and Sewer Trash Removal Utility Billing / Recovery Service Marketing expenses expanded: Marketing Expenses Advertising - Signage Internet Advertising Other Advertising & Marketing Administrative expenses elaborated: Administrative Expenses Training and Education Career Apparel Postage and Freight Telephone Bank Charges and Fees Office Supplies Dispossessory Fees Mileage Reimbursement Expense Printing & Forms Copier Expense Computer Expense Answering Service Dues and Subscriptions Credit Fees Professional / Legal Fees Meals and Entertainment Travel Expense Employee Screening Employee Recognition Overhead - Acctg & Admin Fees Repairs and Maintanance expanded: Repairs & Maintenance Other Interior Maintenance Exterior- Painting Exterior - Doors and Windows Exterior - Carpentry Exterior- Lighting Exterior - Signage Repair Parking Lot Maintenance Tools & Supplies Other Exterior Maintenance Interior - Carpentry Interior - Cleaning Interior - Electrical Interior - Fixtures Interior - Flooring Interior - Hardware Interior - HVAC Interior - Paint Interior - Plumbing Interior - Window Coverings Interior - Appliance Repairs Turnkey Turnkey - Carpet Cleaning Turnkey - Cleaning Turnkey - Painting Contracting expenses can include: Contract Services Landscaping Maintenance Landscaping Other Equipment Rental and Maintenance Exterminating / Pest Control Property taxes are straight forward, and grouped with insurance: Property Taxes Property Taxes Total Property Taxes Insurance Property Insurance Hope that helps.  

Seller can sign from their computer or smart phone.

Almost anything that a human can do, a computer can do better and MUCH faster.

He is working his way through school with a job at a financial institution while he studies computer programming.