I've asked my clients a similar question and have developed tools for them to minimize this, but I find there are a few different types of clients.Manager managed - these folks have no issues as they simply upload their year end statement from their property manager, their 1098 mortgage statement and any other one-off expenses they may have paid for outside of the management company. 

I've helped self-managing investors find good property management after disastrous DIY experiences, and I've helped investors with terrible property management find qualified and reputable companies.

Most people self exclude themselves. 

I am using TurboTenant and self managing the Nomad property.

Build a strong team, prioritize cash flow, and take the time to understand the local market and regulations, especially for development projects.

I use Stessa to self manage 8 properties.

I’ve been considering working for as a acquisition manager for a  wholesaling company, as I believe it would help me develop skills in property analysis and enhance my sales abilities.

.: @Basit Siddiqi @Linda WeygantI believe it’s worth keeping an eye on this development, as this measure is still a proposal and needs to pass through the Spanish Parliament.

I believe their is a strategy here to acquire, stablize and liquidate along the way to build a self funding cash machine.  

When you work at a large corporation (national or global) you learn a lot in your role, but also by osmosis, just by observing other people and seeing how projects are developed, business is done etc.