[操作疑難] Question Part 1 of 2 - HomePlug

Dear C hing

I want to buy a homeplug to get my requested function:
the router > homeplug 001 > homeplug 002 > Device
Q1
homeplug 002 can also provide the wifi function?
any such product? if yes, which brand, model and price?
pls and thx
Q2
if the wifi function of the router is "problem" (my one is levelone 6003, has wifi function but I cannot conenct the wifi), could the homeplug 002 also have connection problem?

pls and thx