Please fill out this survey if you are interested. 

You need to take an internal survey so to speak of your personal net worth.

Our recommendation is for your Surveying firm to complete a Topographic Survey. 

If you have a second and could answer the survey in my signature block it would be greatly appreciated.

I know it's dangerous to generalize, but it would be interesting to know what the  BiggerPocket community thinks of the recent survey by Action.com that was posted in Appraiser News Online that states that real estate investors prefer to flip homes rather than hold them in a portfolio. 

here are the relevant lines: GRANTOR, in consideration of the promises made herein, hereby grants anddemises to GRANTEE and its authorized agents the right and privilege to enter thePROPERTY for purposes of Conducting an environmental and geotechnical analysis andcontour survey over and across the PROPERTY in connection with the PROJECT.

Like most wholesalers, you may have began with guru stuff, they don't teach definitions or terms used in RE, they probably wouldn't recognize a plat map from a survey.

Additionally budgeting for trash pick-up and snow removal is helpful too)5% of gross rents for miscellaneous items (unexpected items that aren't always budgeted for, such as fees for running credit checks, or if you need to survey the property because of a title dispute, fees for hiring an accountant to keep your books in order, or some other random item).This is a more conservative estimate I use when getting an idea of expenses on a property... totaling about 40% of gross rent, and in this case, $800/mo. 

You'll have to get a survey done to see if each property would meet the zoning set back requirements to even be able to subdivide them.

For these properties you have to conduct a rent survey and base your purchase off market rents.