hi ..any successful CRS breeder pls help!!

i wanted to start a CRS tank may be 2 ft tank for a try out ...
would like to asksome Question...

1) CRS haven the pricing is it reasonably (overall, including soil ,shrimp,food)?

2) Is it a must to have chiller for CRS shrimp? ...(wish to breed crs)

3)plants in tank need co2?....is it a must ...as most plant in my tank will be moss

4)From question 5 to 8 is because i saw some ppl sellin onli cl280(w modified) =$140 and some shop selling cl450(w/o modified)=$200
pls comment pricing reasonableme ask 2 ft or 3 ft ...is for future tank upgrade...trying to save some money...max size in future is 3 ft tank..!start of with 2 ft...


5) is it ok to run a resun chiller cl280 in 2 ft tank...?

6)is it ok to run a resun chiller cl280 in 3 ft tank...?will it be over loaded

7)is it ok to run a resun chiller cl450 in 3 ft tank...?

is it ok to run a resun chiller cl450 in 2 ft tank...?will it be too strong...cos the uncle say is ok to put in 2 ft tank then think the kick in interval willl be longer...not so offen...dun know is he trying to cheat me...hehe...cos i newbie...need help..?

9) how abt cl650..$300 .. ?is it too strong for 2 ft..how abt 3 ft ..?

10) any comment on start off with 3 ft tank for newbie??...in my point of view bigger tank ...means higher cost ..bigger equipment...and more soil oso...>>$$

11) one external filter enough .. or need to have some more biohome tray above tank to increase or better water quality..?

Sorry for that long list of question...reply is appreciated...