Partner first extension. Help

[hassan5805]

Hi guys. Can you pls help if possible on some questions.
1) can I pay IHS fee today while completing part form and submit application next week. Will I have to pay excess fee if I submit after 8 January of IHS fee? I don’t want to pay £1000 IHS fee and I want to complete application slowly till next month . My Mrs visa expiring ok 15 Feb 2019
2) I was employed and self employed lady year and year before. My overall income was £40k I left job in April and now only working as self employed. Am I ok to apply under self employed and sendmy sa302 along with business bank statements and last year p60
3) I have bought house but not moved in yet currently living at rent can I show that home?
I will appreciate your response regards

[hassan5805]

Anyone