How much of 401k can be used for income for mortgage?

Please identify which sources of funds would be unacceptable.

Funds stolen from my elderly neighbor would be unacceptable.

An appraisal is good for how amny days?

What source of funds would be unacceptable when applying for a mortgage?

Depends on the supplier, but normally 30 days or a calendar month.

What choices are there?

None of it without penalty unless you are old enough for disbursments. How old are you?

Tackia: please clarify - are you asking whether you can list 401(k) withdrawals as a source of income on a mortgage application?

The initial question is vague and can not be answered so no rating is appropriate.

Any source of funds that were obtained illegally or are not provable, such as stolen money from a bank, or rental income that is paid in cash and cannot be traced.

It depends how much you have, your age, and if you are willing to pay penalties or not, other than that... zero.

Normally 30 calendar days.