Hi and thank you for your question.
The fees for the trustee's work would depend on what amount of time and money was outlayed to start the liquidation process. The ch7 trustee would need to file a proof of claim
with the court, to which you can object if you feel it is inaccurate. The court will usually allow the chapter 7 trustee their hourly rate for time spent on the case, cost of appraisals, surveys, agents etc. You can ask for proof of expenses though.
The creditors in the chapter 13 case will receive proof of claim forms, they will send them in to the court, and will be on file with the clerks' office so you can monitor your claims. Your attorney will have digital access to them as well. You can review your case stats as well at https://www.13datacenter.com/
The chapter 13 is the way to protect the equity in the home, so if the case gets dismissed, the creditors can collect again. Your only other option is to refinance the home, and pay down the creditors, but if you do this on your own, you would need to negotiate the % repayment with the creditors, and you can be taxed on the savings. If you stay in the case, then they are forced to accept your confirmed plan repayment with no tax issue.
Thank you for your question and good luck.