For example, I wasn't informed once that buying in certain areas have really big risks such as horrible tenants, squatters moving in when people move out, stealing everything from your house including water heaters and any metal they can scrap for money.  

I used some advanced materials and techniques that I’ve never seen on any other flip houses.

The common materials used in home construction are floor tile, roofing and siding.

I asked him to do things that didnt require him to go into any apartments before 9 am.. he did not comply.. then when we were getting ready to flip an apartment I sat down with him and asked him to make a list of materials with me he thought he would need so I would have all the materials on site when the apartment was vacant. we sat there, made a list and I said " ok great, how long do you think it will take to paint, put in new counters, and do any repairs needed?"  

@Marina Wong, given the distance between the bents (the metal framing system), I'm wondering if the roof was constructed using SIPS or SIPS-type panels (a rigid insulated panels with a drywall face on the underside and a plywood/OSB face on the other); do you know?  

An example may be that you may have a credit card that has a 20k limit, and for one month, you have to use 19k of that to do buy some rehab materials.

I've demoed Realestateexpress.com, but I found that the material was very convoluted, and I couldn't distinguish the important parts.

Ok, now that you have taken your initial step, below are some quick links to get engaged.http://www.biggerpockets.com/starthere http://www.biggerpockets.com/meet Setting up Keyword Alerts How to Use @Mentions on BiggerPocketshttps://www.udemy.com/biggerpockets-real-estate-investing-course/ (video with 64 lectures and approx 6hrs of material) https://www.biggerpockets.com/real-estate-investing (Ultimate beginner's guide to REI) REI can be very daunting, but, before you go searching for that 1st buy, please take a few minutes to bone up on the tips in link below.https://www.biggerpockets.com/renewsblog/2014/12/19/real-estate-investing-success-smart-tips/ However, you mentioned an interest in wholesaling and I added the link below with a guide that will help you understand the basics of this niche before inking your first deal.http://www.biggerpockets.com/renewsblog/2015/01/31/ultimate-beginners-guide-real-estate-wholesaling-2/?

This house was built in 1938 and has hardwood floors and a metal roof.

However, this site thrives on interactions and as such we encourage two way exchanges and look forward to educational and thought provoking ideas relevant to REI.http://www.biggerpockets.com/starthere http://www.biggerpockets.com/meet Setting up Keyword Alerts How to Use @Mentions on BiggerPocketshttps://www.udemy.com/biggerpockets-real-estate-investing-course/ (video with 64 lectures and approx 6hrs of material)  https://www.biggerpockets.com/real-estate-investing (Ultimate beginner's guide to REI)Before your 1st purchase, please ensure you visit the below link for some tips. https://www.biggerpockets.com/renewsblog/2014/12/19/real-estate-investing-success-smart-tips/REI books suggested by BPershttp://www.biggerpockets.com/renewsblog/2013/04/14/best-real-estate-books/?