Typically, vital connections are transferred to the Singularity. Abraxas also has its own system of magic, so there are multiple avenues to access magic. Since characters arrive without their abilities for the first week or so, you can make use of that to bypass the specifics of how his magic might function on the TDM, for the time being.

Brothels and bathhouses are common in the Free Cities, especially in Libertas. They are not officially supported by the government, but very few things are regulated in the Free Cities to begin with. He's free to find work there if he wishes. However, he will not be able to run his own business to begin with. That will need to be plotted out longer term.

We can workshop both items with you should the character be formally accepted.