Assalam-u-Alaikum
Kindly read this article.
http://www.imanway.com/en/showthread.php?t=1620
A woman’s walee is her father, then whoever her father may have appointed before his death, then her paternal grandfather or great-grandfather, then her son, then her grandfathers sons or grandsons, then her brother through both parents (full brother), then her brother through her father, then the sons of her brother through both parents, then the sons of her brother through her father, then her uncle (her father’s brother through both parents), then her father’s brother through the father, then the sons of her father’s brother though both parents, then the sons of her father’s brother through the father, then whoever is more closely related, and so on – as is the case with inheritance. The Muslim leader (or his deputy, such as a qaadi or judge) is the walee for any woman who does not have a walee of her own.
(Quote from article "Conditions for the marriage contract in Islam" from the above URL)
So if you don't find anyone as described above, then look for an imam to be your wali. Go to the local mosque and ask the imam. Also the wali has to have the same religion as you do.
I don't think the wali is suppose to marry you. He serves a different purpose as indicated in the readings.
A husband is suppose to provide for clothes and bare necessaties of his wife according to his means.
I hope this helps.
Take care
Assalam-u-Alaikum