Couple of days ago a tenant complained that tile grouts were missing and tiles were moving in the kitchen area as attached.

It would depend on what class of property / tenant you're targeting and how much you have to invest.

He is busy working at the hospital and doesn't want to deal with tenants, toilets, taxes, trash, and all that haha

Working full time, another cause for paralysis is not having time to do a reno or handle tenants.

Here are some trends that could play out, or further develop in 2025.Leasing & Tenant Experience AI-Powered Leasing: Chatbots and AI tools will streamline leasing processes, from answering tenant inquiries to scheduling tours.Virtual Tours & Digital Leasing: These will become even more standard, making it easier for tenants to rent remotely.TechnologySmart Property Management: IoT devices (smart locks, thermostats, etc.) will become more common, improving efficiency and tenant satisfaction.Property Management Software: Platforms will integrate more AI for predictive maintenance, rent collection, and financial reporting.SustainabilityGreen building practices and energy-efficient upgrades will be a major focus, driven by tenant demand and potential incentives.AI & AutomationAI will play a bigger role in tenant screening, rent pricing optimization, and even predicting market trends.Automation will handle repetitive tasks like maintenance requests and lease renewals, freeing up PMs for higher-level activities.I'm sure there are plenty more shifting trends that I haven't mentioned and that are sure to evolve over the next year. 

If current lessees move out, how much T/I needs to be done even before a new tenant?

Probably they make it up in upcharges on maintenance repairs, or they will keep all your application fees, processing fees, tenant charges,pet fees and charges or make ready or something somewhere. 

(Just giving an example of MF in a rural idea setting, not all programs require all tenants to work on a farm).

We love investing into properties that we can hold long term and we have been fortunate enough to have great tenants through our intense vetting process that stay with us for long periods of time.

I do not understand your remark as related to the DSCR loan.  2 ADUs are not allowed by f/f conventional financing but is not always enforced.Fortunately if you stay with the current tenant without a refi, by the time you pay principle it is likely the rent will have increased enough to absorb the increase mortgage payment.