The reason "flipping" is not a term to use is it's associated with straw buyers,collusions and other various types of mortgage fraud.
Our broker always tells us to say we are turning over a property,or fixing up a property for resale.
She says you could innocently be say flipping and be around an attorney or someone who is with the re commission that thinks you are doing fraudulent activity,of course you aren't but it safer to use less risky words.
On rehabs what alot of investors due is fix it up then after 3 months refinance to cash out most of the new equity,since a refinance is a loan it is not considered taxable income by the irs which means for example you take 20k out on a refinance it's yours to spend as you like without taxes.Then when you sell you don't have hardly any gain on the property to be taxed or you can just 1031 the profit into another deal to avoid the gains tax.
A good website is John Adams at
www.money99.com He has been in the business for about 30 years as a broker and investor.
Yes he does have systems and stuff like that,but he has alot of free info on the site and also a free radio show he does weekly answering investor questions.He also goes over on his site the 18 reasons he believes single family detached homes are the best investment you can make,he has acquired hundreds of properties in his time and still is active today buying investment deals.I don't buy his systems but do enjoy his radio show and articles.
good luck