Greenhouse or polytunnel, pros and cons for propagation and growing

Which grows best plants, which is best for heat-loving plants, which suffers less pests, and which offers value for money.
I compare my wooden greenhouse (2013) and older (2002) polytunnel.
I sell books and a calendar from my website, with information about growing these and the timings you need, charlesdowding...
Follow me on Instagram charles_dowding, Twitter @charlesdowding and Facebook.
More about my growing history charlesdowding...
My website has much information about no dig, for example charlesdowding...
I have two online courses which include hundreds of photos and exclusive video content, for more information go to charlesdowding...
Videography at Homeacres 16th October 2018 by David Adams, editing by him also.