Home loan qualification for self-employed income, trying to pay less taxes and keep income high for lender?

I am self-employed, and am looking for a mortgage loan next year. I need to figure out how lenders will be underwriting my qualifications/income. From what I understand, self-employed borrowers will generally have to qualify using schedule c's AND 1040's? So, how should I minimize taxes without it degrading all my income for the underwriters' sake?

I have run into a few articles pertaining to what types of schedule c expenses can be added back into my income for qualification ability, and also personal return deductions impact on eligibility. I need help figuring out what these are.

For Schedule C -

Can depreciable assets or assets that you've marked for depreciation on your self-employed business income be added back into the income?

Can home office expenses, such as rent I paid for my apartment and utilities, that I used as a home office expense for my business be added back into my income when qualifying for a mortgage loan?

I have a couple of one time operating costs for my sole proprietorship such as a logo design for my business, can this type of expense also be added back onto my net income?

For my 1040 -

If I take the federal standardized deduction on my personal federal tax return, that deduction reduces my taxable income? Will that deduction reduce my home buying power since it lowers my personal taxable income? If this negatively impacts it, do I have to take this deduction, or can I itemize as 0?

I am contemplating on making a contribution to an IRA account, can that money be added back into income and/or mortgage income qualification?

If I plan on being very aggressive with personal tax deductions, will this also lower my mortgage qualification ability?

Thanks for your help!!