Rent increase on existing tenant

[Jeff Peterson]

I just acquired a rental with an existing tenant in one side of the duplex so after trying to offer her a new lease at current market rate and giving her gradual increases of $150/month instead of going straight to $1450 from $850 and she is balking and says she can’t afford it. Does anyone have a letter Giving written notice that she needs to sign the lease with the rent increase or give notice to move out? Her lease expired 6 years ago.