It sounds like you are saying that your disposable monthly income after expenses is about $1100 a month. Since you would not want to be cash poor and house rich, you wouldn't want to budget that entire amount to a mortgage.
Do you currently pay rent? If so, this amount may be a good starting point to consider as you collect information (from a realtor and mortgage lender.)
Remember that with your mortgage will come, property taxes, homeowners insurance, and possibly HOA dues. In addition, if you mortgage program requires that you pay mortgage insurance due to a lower down payment, this too will be a monthly cost to consider.
Basically, just for your mortgage, your monthly payment will be $453 on a $100,000 home purchase, financed at 4% for 30 years with a 5% down payment. With taxes, insurance, and maybe PMI, you would be looking at about $625.00 a month depending on the rates in your region.
Also, don't make the mistake of overlooking savings and retirement planning, and home maintenance, as part of your larger financial planning goals.
Please let me know if I can be of help with a referral to a lender or realtor in Englewood area.