We need to bring it back, but are, for now, prioritizing our mobile app and a new listings product to help investors find cash flowing deals.

It also results in a nicer product, attracting better tenants. 

This leaves $250 for maintenance/cap ex, vacancy, PM (include it even if self managing because your time it worth something), book keeping, asset protection, misc. 

Even if you cover a slight negative cash flow in the early years, your investment is growing through principal paydown, appreciation, and tax advantages—far outweighing the short-term expense.The key is to shift your mindset: negative cash flow isn’t a loss, it’s a strategic reinvestment into an asset that will build wealth exponentially over time.

I'd never advocate for someone selling an asset unless they absolutely have to or unless selling aligns with their goals.

One is a dedicated parking structure and the other is the asset itself.

My first reaction to your post is if you're purchasing assets that are throwing off positive cash but your DTI is going up then it may be time to re-evaluate the type of assets or the expenses associated with those assets.  2.

Be an asset to them.

For example a 3% appreciation on a $1,000,000 asset is $30,000.

This is off topic sort of, but in general, you do not want appreciating assets inside any corporation.