Proving you can actually afford to live in Poland is critical.
Actually, it isn't. It's a non-issue, as witnessed by the huge amount of residence permits handed out to non-EU citizens. It's not something I agree with, but Poland is quite happy to issue a work permit and residence permit to someone that wants to work in Amazon or similar warehouse. Even if you own your own company, the requirement is a mere 2 employees on a full time contract or that the company revenues total at least 12 x the average monthly wage in the last quarter. As it stands, it's what, around 60k PLN a year? That's nothing for a serious business, and furthermore, the first residence permit is usually granted on the basis of a business plan showing that the business will attain that in the first year.
Proving that you have ties to Poland is also meaningless. They want photocopies so that they can make sure that the documents are genuine and in case you have some interesting travel history, but that's about it. For the average Arab or Indian, they have zero ties to Poland, but they can still easily obtain work permits and residence permits. Poland frankly doesn't care about 'ties', they only care about workers paying into ZUS.
Spending money on experts doesn't change a thing. For a start, basic knowledge of Polish law - an application submitted by post has the same effect as applying in person. The most efficient way to apply is by making notarised copies of all your documents, then submitting those documents by post along with the application form and photographs. The notarised copies have the same weight as presenting the documents in person, yet saves considerable time and effort by the person making the application. Provided the application is in order, and you receive the "confirmation of postage", then you have a legally accepted method of staying in Poland until they call you to get the stamp in the passport to extend your stay.
Money talks and B#11$### walks is still an accurate statement in Poland.
Perhaps from your foreign point of view. In reality, you'll be processed the same way as anyone else. If money indeed talked, you'd get the decision within weeks, not months. 6 months is pitiful for someone that retained an expensive lawyer, especially as you can get the hearing in the Administrative Courts quite quickly.
Don't be seduced by coffee and comfortable chairs. Many people in Poland will tell you that image does not guarantee quality.