Against a short stack- 2 questions

[King Spew]

<font color="green">Hand #1</font> <font color="blue">On this hand, I see 9 clean outs (clubs) plus the 3 aces might be worth 1-2 outs. I suppose runner-runner options can add another for a total 12 outs, giving 2.8-1 odds twice. (What are my actual odds when seeing both?) The buttons push would give me 5.80-3.30 or 1.75-1 odds. Against poor odds, do you ever take a gamble to try and knock out a short stack.... hoping he will be replaced by someone buying in full?
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Party Poker No-Limit Hold'em, $ BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

UTG ($56.47)
Hero ($23.70)
CO ($10.47)
Button ($49.99)
SB ($4.05)
BB ($43.64)

Preflop: Hero is MP with 3[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/club.gif[/img]. SB posts a blind of $0.10.
<font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to $0.75</font>, <font color="#666666">2 fold</font>, SB calls $0.65, <font color="#666666">1 fold</font>.

Flop: ($2.50) 7[img]/images/graemlins/diamond.gif[/img], 9[img]/images/graemlins/club.gif[/img], 5[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
SB calls $3.30 (All-In), Hero calls ????

Hand#1 note: <font color="white">The actual flop was 4D,7C,5C giving me an even closer 16-17 out (1.7-1) odds. I called and button showed AD5D </font>

<font color="green">Hand #2</font> <font color="blue">Not a hand history just a general query.
Two folds to you. You are CO with 4 [img]/images/graemlins/heart.gif[/img]4 [img]/images/graemlins/club.gif[/img] w/ 100BB.
Bttn is short stacked ?BB and has 80/50/20 over twenty hands. Most raises are Pushes.
The blinds are rocks and haven't called any hands where the Button has raised.

What is the break even stack for Button for you to get involved in the hand? We can assume for this exercize that Button will either fold or push if we bet.</font>