I was renting an apt. for 3.5 years, 60 days before the lease expiration landlord informed me she was not renewing the lease for a 4th year.

While the Springs is proposing an Airbnb ordinance, it is much more favorable to investors.)Enforcement #s from Jan. 1-July 31, 201853 reports completed by Denver's excise and license division, all related to questions of someone's primary residence status47 provided necessary documents to prove primary residency6 cases referred to City Attorney's office112 complaints of non-primary residency70 open STR investigationsNew requirements for new and renewing licensesUnlike before, you now have to prove your primary residence by providing at least two of the following documents: vehicle registration, driver's license, voter registration, tax documents or utility billFuture options the committee is considering** Note: any changes to the ordinance would have to go through the Denver city council process and therefore is months if not a year off.

Current tenant has been there for 4 years and has renewed through June of 2019 at $495/mo.

I also like that I can send leases and lease renewals and have tenants e-sign.

I got a quote from Renewal by Anderson, and while this house is in an A+ neighborhood, the quote still seemed high. 

You can 'hit' their credit/credit score OR not renew when time comes up.  

After further inquiry she has indicated that she is getting married and will not renew the lease at the end of term, which is in 3 months.

I would send her notice that you are not renewing the lease and find a new tenant.

If it was already on a month-to-month basis then I would argue that you should have replaced it as soon as the first 30-day period was up.Since it is time for renewal, tell the tenant she can sign a one-year lease or stay on a month-to-month at a higher rate.

They are currently getting all the water they want, for free as part of their lot rent.If we submeter, depending on what's written into the current lease, we may have to wait until renewal time, to start billing them directly for water and sewer?