I developed a SaaS for marketers and constructed a basic sales funnel incorporating telesales.
What I quickly found out is that my niche(marketers) is comprised of technical, high-level users. The same scripted sales approach that made my last company extremely successful was alarmingly unsuccessful when trying to close deals with marketing agencies and consultants.
Eventually I bootstrapped to over a million in sales by trimming down to a handful of coders and a single marketer. We implemented a trial period and let the software do all the heavy lifting. Not only does this reduce overhead and complexity but it also attracts the "right" type of customers. Customers that need convincing typically don't stick around long. Churn is SaaS kryptonite.