@circle11 wrote:
.....Do I need to report that time as personal use and reduce expenses accordingly?
Yes, you do.
@circle11 wrote:
....If that is the case, can I rent the place to my parents for a nominal fee (like $200/month) so that I don't have to report that time as a personal use?
No, you can't. Per Section 280A, every day you rent to an immediate family member (such as your parents) is considered to be a day of personal use unless they use the property as their principal residence and pay fair rental value (in your hypo, they're doing neither).