Hi @Zhong Zhang I have used vacancy hacks over the years to get personal properties under 1% when turning tenants over. 3% increase depends on renewing or getting new tenants, when renewing tenants that's  a safe amount. 

This method provides an indication of value based on the property's rents.

They might be interested in partnering or providing funding for your project. 

We rent it in between $75-125/night, depending on the time of year.

Some lenders offer creative solutions, like a cross-collateralized loan, where they use your existing equity as security without refinancing the duplex.Another idea is partnering with private lenders or exploring a second-position mortgage, depending on your lender's terms.

It will depend on your preferences and how well you think you will tolerate having a room mate as you approach a new life with your partner.

However, I have heard and read of many horror stories of landlords working with incompetent property managers who provide no real value.In attempt to avoid this issue, I am doing my due diligence and asking investors for referrals of trustworthy property manager.

Both options have pros and cons, and the right choice depends on your lifestyle, experience, and long-term goals.

It's not illegal provided you're dislosing it to all parties and not trying to actively hid it.

Long-term tenants provide consistent income and fewer turnovers.3.Long-Term Growth: Germany’s real estate market avoids the volatility seen in other countries.