halacha - Can someone stop being supported by his father without his father's permission?

From the shulchan aruch (yora deya 240.5 end)

אֲבָל חַיָּב לְכַבְּדוֹ בְּגוּפוֹ, אַף עַל פִּי שֶׁמִּתּוֹךְ כָּךְ בָּטֵל מִמְּלַאכְתּוֹ, וְיִצְטָרֵךְ לְחַזֵּר עַל הַפְּתָחִים. וְדַוְקָא דְּאִית לַבֵּן מְזוֹנוֹת לְאִיתְזוּנֵי הַהוּא יוֹמָא, אֲבָל אִי לֵית לֵיהּ, לֹא מְחֻיָּב לְבַטֵּל מִמְּלַאכְתּוֹ וְלַחֲזֹר עַל הַפְּתָחִים.‏

I understand that the mitzvah of respecting my father is even not to work to respect him as long as I have what to eat for today.

My question:

1. 
   
   

   If I do not have what to eat (that belongs to me) for today (so no mitzvah not to work (see source above)) and my father offers to feed me (or commands me to eat his food), does that make the mitzvah of respecting my father and not working applicable to me?

   
   
   
   
   2. If not, (then in my understanding it is preferable that I make money and not live off tzedoka/gifts of my father (the one that hates gifts will live)) how can I make money if I am (Ashkenazi and) still living in my father's house and everything that I make belongs to him shulchan aruch choshen mishpat 270.2.
   
   
   
   

for translation See comment on answer https://judaism.stackexchange.com/a/64925/5120

Sources appreciated. (This is a theoretical question not practical.)