I only do fire and flood from that list , its a bit hit and miss , but I use very little equipment and people different to the carpet cleaning , meaning that I have no costs when not doing fire and flood work . done just over 40k in fire and flood this year, payment takes ages though and still waiting for most of that.
You can make very large amounts on fire and flood if a massive flood happens near you , or you can travel.
In 2007 /8 I made my best ever profit purely in flood work , the land I bought has set me up for life when I build on it.