Yesterday I received a call from my contractor about a new solution.

This may be the solution I go with.

Bathrooms, bedrooms are not being monitored. 

Investors are looking for a solution including property identification and validation, inspections, renovation and management.

If the price point is feasible I'd advise to do your first flip locally that way you can build systems and processes and gain the experience of doing a flip while being able to monitor close by.

So I came up with a solution to buy a non vacant rental property from an investor and use seller financing so I can negotiate a $0 down payment.Has anyone ever done this?

What's the best solution out there for managing document exchange?  

While there's no shortage of options out there,as you mentioned, such as PropStream, DealCheck, REI Simpli, and Podio, the aim is to stand out by honing in on what really matters to investors: ROI, value, performance, efficiency, and possibly price.Expanding on what matters as outlined earlier, here are my assumptions regarding what investors might require if I were to launch a product today:User-Friendly Experience: A platform that feels like second nature to real estate investors, with intuitive design and features that make life easier.All-in-One Solutions: A toolbox stacked with everything necessary for successful investing—from finding leads to analyzing deals and managing properties.Seamless Integration: Make workflow smoother by seamlessly connecting with other essential tools and platforms you rely on.Insightful Analytics: Next-level decision-making with advanced analytics and data visualization that help you optimize investment strategies.Now, the challenge lies in the fact that every investor is unique, and the features might be excessive if they don't offer genuine value.

This means you need a better solution.

Your general pleasure and contentment with your investment might be enhanced by residing in a place that suits your own tastes.The optimal option will ultimately rely on your unique situation and objectives; there is no one-size-fits-all solution.