sure I can help you a bit.
first are you in the USA if so tell me the state.
if you are not in the usa tell me the country.
second was does power cost you? if you are at 10 cents you stand a chance if you are at 20 cents a kwatt you should not mine.
third what are you looking to spend 100 ,200 ,500, 1000 usd?
fourth do you have any power supplies at home?
fifth how important is noise?
sixth do you have a wired internet service to hook up to?
if you want to spend 100-200 you can look for used bitmaintech s-3's on ebay. these burn .8 watts per gh
http://www.ebay.com/itm/Bitmain-Antminer-S3-Batch-5-441-GH-s-5-/291370179377?pt=LH_DefaultDomain_0&hash=item43d7041b31
http://www.ebay.com/itm/Bitmain-Antminer-S3-453-GH-s-SHA-256-miner-only-/111590028804?pt=LH_DefaultDomain_0&hash=item19fb48b604
http://www.ebay.com/itm/Antminer-S3-441-GH-s-overclocked-460-470-Bitcoin-Asic-Miner-/291372173584?pt=LH_DefaultDomain_0&hash=item43d7228910
http://www.ebay.com/itm/Bitmain-Antminer-S3-Bitcoin-Mining-ASIC-440Ghs-stock-In-Hand-/221677453881?pt=LH_DefaultDomain_0&hash=item339d018239
at current coin prices these most likely will not make money
unless you have very cheap power
a good enough psu to run one
internet already hooked up.
one will burn from 300 to 400 watts non stop depends on your speed settings. it will cost 1 dollar a day to run at fast setting and 10 cents a kwatt for power. when I say 10 cents a kwatt I mean full power cost which includes delivery cost.,this machine earns 1.42 usd a day minus power = 42 cents a day. but if you have a psu and buy one for 100 bucks you won't lose much 100 bucks tops. and it may make money.