Keep in mind you don't have to actually be sued. It's enough if there is threat of suit. Here is the law on the matter:
A. A transfer made or obligation incurred by a debtor is fraudulent as to a creditor, whether the creditor's claim arose before or after the transfer was made or the obligation was incurred, if the debtor made the transfer or incurred the obligation:
1. With actual intent to hinder, delay, or defraud any creditor of the debtor; or
2. Without receiving a reasonably equivalent value in exchange for the transfer or obligation, and the debtor:
a. was engaged or was about to engage in a business or a transaction for which the remaining assets of the debtor were unreasonably small in relation to the business or transaction, or
b. intended to incur, or believed or reasonably should have believed that he would incur, debts beyond his ability to pay as they became due.
B. In determining actual intent pursuant to the provisions of paragraph 1 of subsection A of this section, consideration may be given, among other factors, to whether:
1. The transfer or obligation was to an insider;
2. The debtor retained possession or control of the property transferred after the transfer;
3. The transfer or obligation was disclosed or concealed;
4. Before the transfer was made or obligation was incurred, the debtor had been sued or threatened with suit;
5. The transfer was of substantially all the debtor's assets;
6. The debtor absconded;
7. The debtor removed or concealed assets;
8. The value of the consideration received by the debtor was reasonably equivalent to the value of the asset transferred or the amount of the obligation incurred;
9. The debtor was insolvent or became insolvent shortly after the transfer was made or the obligation was incurred;
10. The transfer occurred shortly before or shortly after a substantial debt was incurred; and
11. The debtor transferred the essential assets of the business to a lienor who transferred the assets to an insider of the debtor.
Yours is a close one. And also keep in mind it's not just the rental income that they'll count -- it's also the value of the property itself.