Can anyone recommend apartment style accomodation in Frankfurt?

Answer 1

I think it would be difficult to find an apartment inside the city. I hope you can read some german if not, I can't help you much. You need to look and see and decide if you like a certain apartment and then you can contact the people in English, most do know some English.
http://www.fewo24.de/frankfurt-main.html
http://www.ferienhausmiete.de/ferienhaus_suche1000.php?subregion=67
http://www.ferienwohnung-24-berlin.com/vermittlung/anderswo/ferienwohnung_frankfurt.htm