What else can I do in this case to dispute or to make things easy now that I already renovated the apartment.

Fees should be clearly stated in writing, easy to understand, and justifiable.

I still refer to concepts I learned 50 years ago to this day.  

And, more importantly, unlike many other statutes they are actually rather easy to read, comprehend, and sort through.

Do one task at a time in each app so you can compare apples to apples.Load a property with pictures and details.Market that property.See what your marketing looks like from the public's perspective.Submit a fake application to see how easy the process is.

A Solo 401(k) is generally subject to UDFI but is specifically exempted when the debt-financing is used for the acquisition of real property.When a tax exempt has generated either UBTI or UDFI, the tax paid is referred to as UBIT - Unrelated Business Income Tax.

It’s affordable and easy to set up, but not essential.

It generally refers to removing the tenant from the home while a lease is in place.

It may be easy to rectify, maybe not, depends on your jurisdiction, the issues involved and the City's stance. 

Happy to refer and help you out!